StarsDB: add close function

astrodatagui/db/StarsDB.py

@@ -26,6 +26,7 @@ class StarDB():
         if(dbName in StarDB.__dbNames):
             raise Exception(f"StarDB {dbName} cannot be instantiated more than once!")
         else:
+            self.dbName = dbName
             StarDB.__dbNames.append(dbName)
             StarDB.__instances.append(self)
 
@@ -42,6 +43,11 @@ class StarDB():
         else:
             self.initializeDB()
 
+    def close(self):
+        StarDB.__instances.remove(self)
+        StarDB.__dbNames.remove(self.dbName)
+        self.connection.close()
+
     def initializeDB(self):
         print("Initializing database")
         self.dbCursor.execute("""CREATE TABLE IF NOT EXISTS starnames